A6983IQTR

A6983IQTR is an automotive 38V, 10W synchronous iso-buck converter for isolated applications. It is a device specifically designed for isolated buck topology. The primary output voltage can be accurately adjusted, whereas the isolated secondary output is derived by using a given transformer ratio. No optocoupler is required. The primary sink capability up to -4.5A (even during soft-start) allows a proper energy transfer to the secondary side, as well as enables a tracked soft-start of the secondary output. The control loop is based on a peak current mode architecture and the device operates in forced PWM. The 390ns blanking time filter oscillations, generated by the transformer leakage inductance, make the solution more robust. It is used in applications such as automotive isolated IGBT/SiC MOSFET gate drive supply, OBC (on-board charger) for HEV/EV, and electric traction systems.

• AEC-Q100 qualified, designed for iso-buck topology
• Operating input voltage range from 3.5V to 38V, load dump tolerant up to 40V
• Primary output voltage regulation, no optocoupler required
• Peak current mode architecture in forced PWM operation
• Internal compensation network, internal soft-start, enable pin
• Overvoltage protection, output voltage sequencing, thermal protection
• Optional spread spectrum for improved EMC, power good, synchronization to external clock
• Minimum on-time is 390ns typical at (TJ = -40 to 150°C, VIN = 12V)
• Shutdown current from VIN is 2μA typical at (VEN = GND, TJ = -40 to 150°C, VIN = 12V)
• Operating temperature range from -40°C to 150°C, QFN16 package